testrunner: even more `SettingsBuilder` usage and `const` cleanups#5030

Merged

firewave merged 2 commits into

cppcheck-opensource:mainfrom

firewave:settings-xml

May 4, 2023

Commits on May 3, 2023

moved some of the test-only `Library::loadxmldata()` calls into `test`
firewave
committed
testrunner: reduced need for backup/restore of settings
firewave
committed